Last year I came across this Team AGS bore drop Nelson which I purchased with the intention of parting for other projects. While disassembling I came across a variety of very interesting parts I wanted to document.
Overview of the Team AGS Bore Drop Pump
Quickly looking over this Nelson based pump the Rebline pump handle, the Wintec one piece frame, the long taso thread barrel and Lapco Grey Ghost stock stand out.
Other more subtle components such as the Sniper 1/Sniper 2 Female asa to male 1/8th npt fitting, the Taso front and rear sights, lapco style asa (again, anodized close to ghost colors) and the large brass pump arm screws also stand out.
In the photo above, the Taso pump stabilizer/stop is visible between the pump arms. This keeps the two arms in line, can retain a spring and can be used to stop the pump from slamming the pump arm slots, destroying them.
This example may have come with the Wintec one piece frame, since AGS used the Wintec /Lapco frames after 1990 when they split from Taso. The super long barrel has Taso / AGS threads and could have also been stock.
Adventure Game Supplies (AGS) used the name Team AGS throughout the production of various markers before and after David Craig’s split with Matt Brown (Craig took AGS and Brown started Taso).
I haven’t seen any actual tournament standings or articles listing a “Team AGS,” so markers with this engraving were likely not team guns, but this term may have been used to differentiate AGS’ higher end markers.
Before Craig and Brown split, AGS would have used this terminology on the AGS comp gun and maybe some Vindicators. After the split, Craig continued using “Team AGS” on Bloodsuckers (his bore drop pump).
I don’t know exactly when this marker dates to, but likely 1989 to 1991.
Team AGS Pump Breakdown
Breaking down this pump I found an unmarked powertube and a Line SI valve retaining screw. The Hypertech interlocking bolt and hammer set were the most exciting internal components.
A closer look at the body shows the pump stop and the two brass thumbscrews.
With this set of internals, the top rod connects into the bolt, and with the pump arms aligned with the pump slots, and the hammer in the receiver notch, the two cylindrical outer diameters are kept directly inline and can’t manage to kink.
Kinking in Nelson pumps is typically caused by the main spring on a Nelson based pump when you’ve pumped the Nelson bolt back to catch the hammer and your spring tension pushes the hammer and bolt so they aren’t perfectly lined up.
Dual pump arms help alleviate the issue of kinking/binding but Colin Thompson (Lapco), Sigma Precision, WGP, James “Howdy” McGuffog and other early Nelson based pump innovators and manufacturers resolved this issue by using a long inner tube in the center of the bolt which pushed into the hammer and lined the two up as they connected.
Line SI’s internals used the hammer lip sliding into the bolt to keep these two vital pieces inline.
I have not tested these internals, but I would imagine the protruding steel rod on the hammer is exactly as long as the pump slot on the bore drop markers so that the two never actually unlock.
These internals are stamped with “Patent Pending” and “HB302M.” Hypertech’s approach was unusual and likely not duplicated because of the “patent pending” attempt and the need for a more exact fit. If the pump these were used in had a sear slot that was even slightly out of spec then there could be mis alignment issues (I would imagine?).
Date on these internals is likely 1989-1992?
These Bore Drop Hypertech internals are actually the second set of Hypertech internals I found last year. The set in the video above came in a lot of phantom parts and and is stamped HB201, Patent Pending.