1073 ICONIC & EXCEEDINGLY RARE ASI CHINA LAKE "PUMPER

CURRENT BID
0.00USD
ENTER YOUR MAXIMUM ABSENTEE BID[?]
You must bid at least
8,000.00USD
USD
8,000.00 x 1 unit = 8,000.00USDApplicable fees & taxes are added at checkout.
[?]Live Online Auction Starts In 2026 Nov 06 @ 10:00 (UTC-04:00 : AST/EDT)
Category Firearms & Military
Auction Currency USD
Start Price 8,000.00 USD
Estimated at 16,000.00 - 20,000.00 USD
THUMPER" SLIDE ACTION GRENADE LAUNCHER RECEIVER. Cal. N/A. S# 40MMPGL40. Bbl. N/A. Iconic China Lake "Pumper Thumper" slide action grenade launcher developed at the Special Projects Division at the China Lake Naval Weapons Center. The Special Projects Division was responsible for developing, prototyping, and modifying numerous small batches of special purpose small arms with a small turn-around time for issue to elite special operations units, most notably the Navy SEALs. Noted author, Kevin Dockery, indicates that in their three years of business, the China Lake facility was able to complete approx. 375 of the aforementioned rapid response orders. Their most well known and regarded development being the China Lake grenade launcher. While the M79 (stand alone) and M203 (under-barrel) 40mm grenade launchers were effective, additional firepower was requested. China Lake quickly developed a 4-shot (3-rds. in the tube, x1 in the chamber) launcher which utilized an action similar to that of pump action shotgun, which had been extensively used in both military and sporting applications for decades. After approval by the SEALs, a small batch of approx. 20-30 launchers were mfg. and sent to SEAL units in Vietnam, with a few single examples sent to Marine Force Recon and Army 5th Special Forces Group units. Very few of these original examples are known to still exist today. This example is an exact reproduction, fabricated from blueprints that were reverse engineered from an original example in the Washington Navy Yard Museum. A small number of hand built and fitted units were completed prior to the project being ultimately abandoned, before production was resumed by Armament Services International (ASI), who utilized modernized CNC machining and heat treating. This ASI mfg. example is marked "ARMAMENT SERVICES INTERNATIONAL/ WARMINSTER, PA/ 40MMPGL13" on the left side of the receiver. Alloy receiver, mag. tube, and front sight assembly, with steel dual arm action bar, trigger, and small parts. Metal components exhibit a matte gray finish. 1-piece plain wood stock with grooved Boyds solid red rubber recoil pad. Deeply ribbed black synthetic pump. Standard dovetailed blade front sight assembly with protective "ears". Tang mounted sliding safety. (NOTE: since this example is without a bbl., it is classified as a receiver. Upon successful approval of an ATF Form 1 (5320.1) for this item as a Destructive Device, the corresponding numbered bbl. will be provided by a third party). UNATTACHED ACCESSORIES: fitted OD nylon soft case produced under contract by London Bridge Trading Company. CONDITION: excellent, with metal components retaining the vast majority of their original factory finishes, exhibiting a few small scattered superficial marks from handling and storage overall, with some light thinning on the mag. tube from cycling of the action. Stock is excellent. With even the reproductions being produced in extremely limited numbers, this is a seldom presented opportunity for one to acquire an example of the iconic China Lake "Pumper Thumper" grenade launcher. PROVENANCE: Military Museum Collection of Shooters Outpost, Hooksett NH. (26-3770/MLW). MODERN. $16,000-20,000.