5.56 Timeline

Bobby Pruett, 1-0 MACVSOG

Today we are going to look at a few pictures of Bobby G Pruett a SOG recon team 1-0. These photos are from late in the war when SOG had been renamed and the American team members only ran ground operations inside South Vietnam to cover US withdrawal from the country. The president had ended all American cross border ground operations at this point. Which didn’t matter much since PAVN troops had moved most of the famous HCM trail over into RVN due to American forces mostly being gone and not able to occupy as much areas as they had previously.

Since SOG now operated in RVN there was no more worry about sterilized uniforms being found on an American in Laos and Cambodia and proving US troops where in countries denied by the US gov. Because of this we see them wearing the ERDL 3rd pattern jungle uniform. Bobby is wearing the ERDL camo pattern jungle uniform that he has had modified with extra pockets.

He is using a modified SKS chest rig to hold the new 30 round M16 magazines and a mix of M67 gear and M56 webgear. The 2qt canteen pouch being part of the new nylon m67 gear.

The back pack Bobby is wearing is not the ALICE pack that was used post war. That is the Nylon jungle rucksack. It is similar but has a metal X frame. In the middle picture you can see the extra pockets he added to his ERDL pants below the thigh pockets.

Bobby G. Pruett served three tours in Vietnam. His first tour was in 1965-1966 with the 39th Combat Engineers, Bob’s second tour was in 1969-1970 with 5th Special Forces Group (ABN), Project Delta, Recon Section and his third tour was in 1971-1972 with Military Assistance Command Vietnam Studies and Observations Group (MAC V SOG), Task Force 2 Advisory Element (TF2AE / CCC), Recon Company where he served on Recon Teams Iowa and New York.

In April 1972, MAC V SOG was deactivated and Strategic Technical Directorate Advisory Team -158 (STDAT-158) was created. Bob was reassigned to the recon / special mission element that was titled: SPECIAL MISSION FORCE as a Platoon Leader. ( all of which was still SOG in all but name)

1-0 Sgt. Edward Ziobron Command& Control Central MACV­SOG, 5th SFG(A), 1st SF, Kontum, Republic of Vietnam.

Sgt. Edward Ziobron

On Nov 26 1970, Sgt. Ziobron and his recon team from MACVSOG, where tasked with conducting a clandestine operation into Loas.

Upon insertion, the team came under intense fire from and overwhelming enemy force. Although wounded in the face , left arm and leg by a B40 rocket, Ziobron lead an uphill charge against the entrenched enemy, killing 10 communists with rifle fire and hand grenades. Upon reaching the top of the ridge, he took an M60 and continued his assault under murderous fire, killing 6 more in the process.

The next day, the team decided to call in an extract to get the wounded out. On the way, the came under fire from two AA guns. Ziobron took them out with a LAW rocket. The enemy then launched an attack with the intention of over running the team.

After running out of ammo with his CAR15 ,Ziobron killed one with his .45 pistol and another he beat to death with his own SKS rifle. With the battel raging, he was shot in the right leg and his Achilles tendon was severed. Using his CAR15 as a crutch, he began calling in danger close airstrikes, took out around 20 NVA with claymore mines and rescued one of his team mates under fire. With the PAVN troops closing to within a few meters, he killed 2 more with his M1911 and one with a M79 round. His actions inflicted such heavy casualties that he broke the attack.

Despite his wounds, he led his team to the LZ to be extracted the following morning. When he boarded the helo, he was down to only three rounds left.

For his actions, Ziobron was awarded the Distinguished Service Cross.


Ziobron using an XM21 in either Laos or more likely Cambodia due to terrain being more favorable for Sniper rifle use. Being part of Command&Control Central, Ziobron would have run operations in southern Laos and northern Cambodia .You can see the WW2 leggings that was a popular piece of gear for SOG recon teams.

Colt ‘CS’ Stock

Guest Post by Brent Sauer of www.TheColtAR15Resource.com

Colt ‘CS’ Stock

          Anyone who collects Colt AR-15’s knows that there are many part variations across Colts AR production history. As a newer collector (I began collecting in 2017) I come across new (to me) variations on a pretty regular basis. On December 1st, 2019 I came across a Colt rifle stock with a ‘CS’ marking on it. I had not seen this stock variation before nor had I seen any online discussions about the Colt CS stock. Curiosity leads me down rabbit holes and away I went.

          My search for information on the Colt CS stock began with a Google search. The search results were limited to mostly archived posts on AR15.com. Simultaneous with the Google searching, I had made a post on AR15.com in the Colt ‘Industry’ section looking for information as well. The Colt ‘Industry’ section has several knowledgeable collectors that visit there. I additionally found some bits of information from other places like snipershide.com and M4carbine.net. So, the information that I am presenting here is a combination of data gathered across the internet and some data that originates from me.

History and origination of the Colt CS stock

The history of the Colt CS stock goes back to World War II and originates with the Lee-Enfield No.4 Mk I rifle as used by the Canadian military. The rifles were produced with different lengths of stocks available in Bantam (B), Short (S), Normal (N) and Long (L) lengths. The use of different stock lengths continued when the Canadian military converted to the C1A1 (FN/FAL) rifle beginning around 1955. The C1A1 was available with Short (S), Normal (N), Long (L) and Extra-Long (XL) stock lengths.

          The Canadian military had a simultaneous rifle development program going on during the same time that the United States was developing the M16A2 rifle. These programs were so closely aligned that the Canadian military had a Canadian Forces liaison officer working with the United States Marine Corps in the program that was officially known as the M16A1 Product Improvement Program. The Canadian liaison officer would call back USMC test results to Canada and they implemented lessons learned into their rifle development program. Born out of the liaison with the USMC was the Colt Canada C7 rifle which was adopted by Canada about 1984. This rifle later evolved into the C7A1.

          The Colt CS stocks discussed in this article were used on the Colt Canada C7/C7A1 rifles. Design specifications in the C7 program continued the Canadian military tradition of having multiple lengths of rifle stocks available for Canadian military personnel. The stock lengths used on the Colt C7/C7A1 rifles were Short (CS) and Normal (A2 length). There was an additional .5-inch (13mm) spacer available to increase stock length if needed.

          The C with a ‘nestled’ S, as seen on the stock below, is an abbreviation from the French / English combination of Court / Short. Court is the French word for the English word short.

Fixed stocks were gradually phased out of Canadian service around 2004 as the Colt Canada C7A2 with collapsible carbine stock came into service.

History of the Colt CS stock in the United States

          I was not able to identify exactly what year that the Colt CS stock became available in the United States. Information found on the internet indicated that the stocks appeared around 1991 on civilian rifles. The Colt CS stock is featured on two Colt rifle variations in the Colt 1992 firearms catalog. The two rifle variations that featured the Colt CS stock are:

          1. Colt Model R6530 Sporter Lightweight (.223 carbine with CS stock)

          2. Colt Model R6430 Sporter Lightweight (9mm carbine with CS stock)

If you look closely at the rifles in the catalog photographs, you can see the ‘CS’ letters on the stock just behind the rear of the lower receiver.

I have not been able to find any solid evidence of the Colt CS stock being factory installed on any other rifles. However, we also know that just because a product appeared in a catalog doesn’t necessarily mean it appeared in the retail market and vise-versa…products could have appeared in the retail market and not the catalog.

          I have seen former CS stock owners discuss selling these stocks for anywhere from $50 to $225 dollars. This CS stock is the first one that I have seen for sale in roughly two years (2018 – 2019) so they seem to be pretty rare. My winning bid on December 1st, 2019 was $193 dollars so I paid about average current market value it seems. Several people have stated that they still have factory rifles with the CS stocks present. Several factory rifle owners have talked about having removed the CS stocks over the years and replacing them with various other commercial stocks. Obviously, that is not a good move from a collector’s perspective.

Technical details of the Colt CS stock

The Colt CS stock is popular for being made from the more durable A2 rifle stock materials but maintaining the A1 rifle stock length. For comparison I have provided the following data using three stocks that I have on-hand:

A1 stock length: 9-7/8 in.          A1 stock weight: 15 ounces

A2 stock length: 10-5/8 in.        A2 stock weight: 14.9 ounces

CS stock length: 10 in.              CS stock weight: 13.3 ounces

The ‘trap door’ on the CS stock storage compartment is a metal assembly. The inner compartment is yellow to facilitate seeing items stored inside.

I hope that you found this article informative. Please feel free to comment and provide any additional information that you may have.

The EM-2 British Bullpup

A face only a mother could love

The EM-2 is one of the big what-ifs of military adoption history.

The EM-2 is a rare thing for small arms circa 1950 as a intermediate caliber bullpup. The round conceived for the futuristic looking rife being the .280 British round. Variants also being in 6.25×43mm, 7×49mm and 7.62mm. The British adopted it for about 30 seconds then changed their mind. Going on to use the now famous FN FAL in 7.62MM NATO.

This gun belonged to the designer , Stefan Janson. Following the EM-2 project , Janson came to the US and worked for Winchester on the SALVO project, at some point he gave the EM-2 to the company who later gave it to the Cody Firearms Museum.

The British apparently really liked the idea of the bullpup rifle. The L85/SA80 becoming their standard service rifle since 1985. Though its record has been…questionable.