Product Description BATTLE ARMS Thumper Compensator 9mm Black 1/2x36 Threaded BATTLE ARMS Thumper Compensator 9mm Black 1/2x36 Threaded at KYGUNCO Browse all KYGUNCO deals $70.99 Out of Stock Price verified today Buy Now at KYGUNCO Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Battle Arms Development Shooting >> Gun Parts Battle Arms Development