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  1. MCX bumper (buffer) screw insanely tight

    SIG Sauer Rifles
    Good evening all. New MCX (legacy) owner here. I'm disassembling the upper and lower for cerakoting and have run into an issue. The bumper retaining screw is super tight, so tight that I'm concerned about breaking it (or a hex bit). I was able to break it loose a bit so that it now rotates...
  2. Sig 516 Upper - buffer/spring question

    SIG Sauer Rifles
    Hi everyone, I'm buying a 10" Sig 516 Upper (barrel, BCG, Charging handle, handgrips, etc.) from a private seller. It does not come with the "Sig heavy buffer and spring." I already have an AR-15 Pistol Lower (complete with the Tailhook Mod 2 brace). Do I need to buy the Sig heavy buffer and...
  3. 516 5.56 Buffer spring and weight tuneing

    SIG Sauer Rifles
    So my local gun shop guy talks so much to everyone about how all ARs are over gassed and so just swapping the buffer spring to a red extra power spring to help waste less energy in the gun and also provide a more gentle recoil. He was also saying swapping to a heavier buffer would probably help...
  4. Looking for a AR10 MilSpec Buffer/Tube/Spring

    SIG Sauer Rifles
    Evening yall, I recently picked up a Magpul PRS to replace the ACS on my Sig716 Patrol (OD Green). I have been scouring the web looking for a site that has the parts I need: Buffer (Found one at Slash's Heavy Buffers) Spring (Again found one at Slash's) MilSpec RIFLE-length AR10 Tube - This...
  5. P220 EFK Double Recoil Spring Buffer

    SIG Sauer Pistols
    Hi Ya'll Probably I'm doing this a-backwards, but I got a great deal on and have now installed the EFK Firedragon Dual Action Buffer Spring kit in my Sig P220 in 45 ACP. Anybody have any experience with this item? I'll be test firing on Saturday and wanted to know if there are any idiosyncrasies...