Features:Improved tolerance stainless steel USGI style tube with enhanced feed lipsLaser welded tubeNumbered witness holes for visual round countStainless steel follower with heavy-duty spring for long-lasting tension and durabilityHigh tensile rocket wire springWelded base plate for the ultimate in durabilityFlush fit for minimal bulk and easy concealmentDrilled for base pad (sold separately)Smooth finish for easy insertion/removalLong-lasting function in dirty environmentsCMC's 100% satisfaction guarantee