Is there any differance in the spikes ST.22 lower besides being marked .22 and any other lower reciever? And if not can I assume any lower could be used to build a .22 based rifle?
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Is there any differance in the spikes ST.22 lower besides being marked .22 and any other lower reciever? And if not can I assume any lower could be used to build a .22 based rifle?
Member
No one ever built a .22 here? No experience with it at all?
Member
Your best bet would be to contact Spikes.
Originally Posted by Larry Vickers
Member
If only they would answer the phone.
Senior Member
Google says your assumption is correct, check it out.
Member
Okay, I know that the upper drops onto the lower gets pinned and everything is good. Same internal parts, except I have heard sometimes some heavy springs are used. I was just wondering about the now unuesd buffer tube and assosiated parts. I did find I could use a ace type folding stock. I do have a Spikes .22 upper on the way. The Spikes .22 lower is listed at 179. And a multi caliber is much lower. Just wondered what the difference is besides $. This isnt my first AR just the first one for a build.
Member
Nodifference. Both lowers are interchangeable. Spikes did have one time specifically marked .22LR lower instead of multi.
Member
No difference. It should work fine with a 5.56 upper.
Personally, I don't want a lower marked .22.
Dave N
Last edited by shadow65; 12-23-12 at 09:50.
Independent Field Testing/R & D
Better to die for something than live for nothing
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I bought a full up ST22 years ago. The lower is a normal 5.56/.223 lower with no "gotchas". Mine was marked multi caliber, I think they have been doing that for years. I don't know if there is any legal ramifications of putting a 556 upper on a .22LR marked lower but I don't think they have been marking them that way for a long time so it shouldn't be an issue.
As an aside. I run two ST uppers and I have started using a Boonie Packer "Better Mag S&W" adapter instead of using Black Dog mags. The adapter gives full bolt hold open capability and you use S&W 15-22 mags. My 15-22 has never malfunctioned in over 1000+ rounds and I partially attribute that to the magazine design. My ST22 runs like a sewing machine with Fed Bulk pack but try any Remington and it malfunctioned continually. With the S&W mags the only malfunctions I get with the RGB ammo is the occasional failure to fire which I find is much more common in the shitty Remington ammo. Bottom line, for 40 bucks this has been a great addition to my .22 upper plus the S&W mags are WAY easier to load than my BDM mags.
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