I have an excellent condition SIR #58MOD military model . This model require the removal of the delta ring and the front habdguard cap. this is the slim line bi-level SIR 58 with the front rail extension that covers the front sight base.
I also have an excellent ARMS #40 and ARMS #22/M68 Aimpoint mount. This is the combo I had on my Colt M4. I am now selling the package, SIR, #40 and the #22/M68 for 449.00 shipped.
SIR M58MOD for 320.00 shipped.
ARMS #22/M68 Aimpoint mount for 80.00 shipped.
I will not sell the #40 alone.
Thank you for your time.