SI Defense

Cold_Bore_88 · Jul 27, 2013

Has anyone heard of this company? I have been looking at building a new .308 (recently posted a thread about barrel length). I like the design and setup of their .308 receivers. Aesthetically pleasing, forward assist, etc. I can't find much in the way of reviews though. This kind of scares me a bit. Any advice? Going with 16" SS barrel and 9" rail. I want to keep this thing light.

J Mack · Jul 27, 2013

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ontFlipMirrorIndents/> <w:OverrideTableStyleHps/> </w:Compatibility> <m:mathPr> <m:mathFont m:val="Cambria Math"/> <m:brkBin m:val="before"/> <m:brkBinSub m:val="--"/> <m:smallFrac m:val="off"/> <m:dispDef/> <m:lMargin m:val="0"/> <m:rMargin m:val="0"/> <m:defJc m:val="centerGroup"/> <m:wrapIndent m:val="1440"/> <m:intLim m:val="subSup"/> <m:naryLim m:val="undOvr"/> </m:mathPr></w:WordDocument> </xml><![endif]--> I have two Primary Weapons Systems rifles with the SI receiver sets and like them very much.
I believe all the PWS large frame AR’s are based on the SI receiver.
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ORD · Jul 27, 2013

They are first-rate products from top to bottom. I have seen several custom rifles built on their receiver sets with excellent results. A buddy of mine (wvtrainer here on the Hide) is in the midst of a built-out on one now. I haven't had the chance to get it all together for him as he's waiting on his barrel and some other sundries to arrive, but thus far, it is VERY nice indeed. I have no problems recommending them.

Also, and you might check with him on details, I think that RW Snyder (one of the many highly regarded smiths here on the Hide) has done some builds with them in the past with great success. Might pick his brain for more details if he can help you.

Deerhunter · Jul 28, 2013

Im building a 308 on the matched upper and lower and am very pleased with the fit and finish. Everything is nice and tight and Im already thinking of buying a matched upper and lower ar15 just bc i like there stuff.

leadbullet · Jul 29, 2013

I have their 16 inch 300 blackout barrel and it is a gem. I was skeptical like you before ordering from them since I had never heard of SI before but i don't regret the move at all.

FN in MT · Jul 29, 2013

They are a Montana company based out of Kalispell. I've seen them with a table off and on at the bigger MT gun shows for 3? Or maybe 4 years?

I know two people who used their uppers/lowers and built guns...both happy.

Another "Boutique" AR builder is also in Kalispell; NEMO Arms. Have a friend who used their top of the liine .308 Match grade at a Course we took in OR a month back. She had zero issues and was hitting the 1K steel regularly.

I have limited knowledge of NEMO but I'd say the SI guys are GTG.

BTW....Thanks for buying "Made in MT" We need the money.

Nutro · Jul 29, 2013

SI Defense is good to go. I had 2 of their billet 5.56 receiver sets and loved them.

Although, my FFL ordered me a billet .308 receiver set for over 4 months now. They keep telling him they will ship them but they never do.

lennyo3034 · Jul 30, 2013

I have a .223 receiver set on the way from RWS. Will report when the build is finish.

Zebra644 · Jul 30, 2013

I did a lot of research on them, and they are good to go. I almost bought a matched upper and lower in .308 from them during the great black rifle famine. The only reason I didn't was I found my AR-10 Super SASS at my local gun store and bought it instead of trying to find parts and then paying almost twice what they were before.

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