A.R.M.S. #51 S.I.R. System A2 Carbine Length
The system for S.I.R. (TM) is formulated to fit flat top receivers for mil-spec, from Armalite, Colt and Bushmaster, in lengths of 5.56 carbine.
There might exist other flat top receivers that have been created, which may fit appropriately; however, we do not promise or provide a warranty for S.I.R. (TM) on any receivers (flat top) apart from the ones previously listed.
This sleeving system for modular receiver is a global mounting system for Handguard, which enables the barrel to float completely free while offering a strong ultra-light platform; here, literally any accessory for a particular mission can be mounted, such as lasers, thermal imager, night vision, M203, optical sight, etc.
Simultaneously, safety is offered to the receiver and it is able to make it unnecessary to substitute a destroyed receiver.
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