This post is based on information I started gathering and initially wrote up back in 2004 when I found a few brass replacement bodies for Nelspot 007s.
At the time I had seen ads from several companies offering similarly constructed brass Nelsons which peaked my curiosity and made me wonder if there was a link between distributors or a shared manufacturer.

So over the last ten years I’ve scanned images I’ve come across and purchasing a few different models to help illustrate the differences.

Overall their are two main styles, the brass breech drop body version (stock 007 bolt) which is primarily labeled the Texas Air Guns (or Tag) body kit and the brass bore drop version (Bushmaster or Grey Spirit length bolt but with different outer diameters) which was distributed under various names.
Texas Air Guns and the name of D. Heckman seem to run between several ads and articles for various distributors so I believe that Heckman was the person operating Texas Air Guns and selling the body kits to various retailers where they were then rebranded.
The construction of the bore and breech drop bodies are nearly identical. Both are made from an inner bore piece with an outer sleeve of brass soldered together, just past the breech.  

The above article, which appeared in the 1988 issue of Frontline shows the earliest TAG breech drop kit and was written by D. Heckman. Heckman also wrote a similar article for Action Pursuit Games around the same time.
The Brass Texas Air Gun Breech Drop Body kit was first a stand along body and later offered with a pvc pump arm.
This body kit dropped directly onto a stock Nelspot 007, replacing the stock class body with the brass body. No other parts were needed to convert a stock horizontal feed 007 into a direct feed paintgun.

The Tag Breech drop kit uses a one armed pump to move the stock Nelspot Breech drop bolt back and forth. The Breech drop style bolt pushes the paintball out of the breech into the smaller id bore of the barrel.
I believe this body kit was made from 1987 until 1989.

Features of this Breech Drop kit include:

•Soldered on Direct feed. The Breech Drop model has the feed over the front of the frame. The Bore drop model has the direct feed further forward and is notched for the right side arm. Since no pump handle needs to bypass this feed on the right side of the breech drop kit (on the body shown above) there is no need for a notch.

•PVC Pump handle with a sighting notch in the top.  This pump handle is very similar to the pump handle used on the PS-15 Marauder.

•Stepped Barrel tip. The tip on the barrel on the Breech and Bore Drop bodies is identical, which suggest a similar, or the same, method of construction.

In 1989 a Brass Bore Drop body of similar construction was introduced.
This is where the name of the body kits becomes confusing, since there are between three and five different paintgun names printed in magazines articles and advertisements. But all of the brass body kits appear to be the same bore drop body, just rebranded with various companies name.

The Bore drop body kit consisted of a brass barrel, the dual sided pump, and a Bore drop bolt. The kit pictured above uses a anti kink bolt so it would need a stock nelspot hammer that has the center inner diameter opened up.

The odd bolt used a typical bore drop outer diameter nose to push the paintball in the breech but used a center outer diameter that was a litter smaller with only the sear ledge being the full breech outer diameter.
This bolt used a Brass anti kink interior shaft which was not adjustable and was likely press fit or soldered/braised in. Earlier versions likely lacked this anti kink back end.

The pump handle and body were of similar construction to the Breech drop Texas Airgun kit.

Similarities include and features of the Brass bore drop kit include:

•Stepped barrel is constructed exactly the same and soldered in front of the breech and on the steps as the Breech drop body.

•PVC pump handle is very similar but lacks the sight notch on top. Ribs are spaced closer together.

•The PVC pump handle is cut from PVC.

•Dual pump arms (left and right).

•Direct Feed Neck on the Breech Drop body kit looks close to identical and is soldered onto the body at the same angle.

•Notched Feed Neck to allow clearance for the Right side pump handle.

Distributors for the Bore drop kit included:

•Joliet Army Supplies (J.A.S.) Heckman Competition Gun.
Joiliet, Illinois, is the same town where CPX is located and Living Legends takes place.
D. Heckman is also the author of the Frontline new product write up for the Texas Air Gun breech drop body kit so it’s possible he was also the producer.

Hawk Combat Supplies in San Diego also distributed the later bore drop body kits.  Hawk, which later became California Paintball Supplies, was run by Carey Snodgrass, who played on Navarone and later went on to captain team Top Gun and manufacture and market the Top Gun Pump.
Hawk also offered brass barreled Sheridans, which look similar to early RTP/Paintball Pro Shop markers (also in San Diego).

Hawk marketed their Bore Drop Nelson body kit as the Texas Air Gun kit which likely proves the bore drop kits were originally sold and manufactured by Texas Air Guns.

J & J Performance marketed a replacement brass barrel named the Performer Stage 1.
I emailed J and J around 2004 and their reply was:
“We quit making those in 1991. There [were] only 50 of them that the owner had done.”
I’m not sure who replied to my email, but I think the person replying was referring to Joe West.

I also asked Dale Hilton about the Nelson body kits. Dale worked for J and J, and Joe West, before making his own barrels as Barrels of America (BOA).
Hilton responded, commenting on the construction method of the nelsons:
“The nelson barrels were really heavy due to the one inch OD tubing [being] soldered over the [barrel inner piece]. Later barrels just had a small one inch soldered on where the pump arm was, [which] made them a lot lighter.”
And Dale goes on to comment that he was unsure of the kits origins:
“I don’t remember if J.A.S. and Joe were in bed together or if Joe Copied them.”

And Adventure Games of New Hampshire marketed the TAG paintguns as their Ranger Line. Their advertisement is unique because it shows both the earlier Breech Drop and later Bore Drop Nelson based paintguns beside each other.

Above is a neat Bore Drop example of these barrel kits, which I purchased from Gabriel Tyler back in around 2003. This paintgun has all the listed bore drop features including the stepped barrel end, breech drop bolt, PVC pump arms, and notched feed necks. 

And here is the one of the Breech drop Nelsons listed on the baccipaintball (not for sale yet since I need to check on the pump handles compatibility with the PS-15 Marauder):
http://www.baccipaintball.com/t1346.html

And another Tag body kit in Breech Drop that is empty but will drop onto a Nelspot 007.
http://www.baccipaintball.com/b042.html

And one of the Bore Drop kits assembled that has been pretty well used.
http://www.baccipaintball.com/b043.html

Another paintgun which should be included in this list is the later Hawk Nelson which featured a removable barrel.  This Nelson was market by Hawk in San Diego and released slightly later than the ad featured above. Unfortunately I don’t have any media illustrating this nelson but it is different enough that it wouldn’t easily be confused with the Texas Air Gun models.

If anyone knows any more information on D. Heckman please post or email.

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