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thibear
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Post subject: ST-22  Posted: Sat Mar 09, 2013 11:04 pm |
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Joined: Thu Apr 12, 2012 7:53 am
Posts: 33
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Has spikes ever made a dedicated .22 rim fire upper with an 11.5 barrel? Saw one recently and not sure it is a full spikes product.
Thanks for any info!
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JaxChris
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Post subject: Re: ST-22 Posted: Mon Mar 11, 2013 12:07 am |
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Joined: Mon Dec 06, 2010 7:26 pm
Posts: 2838
Location: Florida
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Yes. There used to be 11.5" ST-22 uppers. The barrel length would come just an inch past the FSB, because dedicated 22LR barrels recess 1.5" deeper into the receiver than other AR barrels. Example: 16" ST-22 upper would measure up next to a 14.5" ST-15 upper.
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thibear
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Post subject: Re: ST-22 Posted: Mon Mar 11, 2013 8:08 am |
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Joined: Thu Apr 12, 2012 7:53 am
Posts: 33
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Can the bolt from that dedicated upper transfer to another spikes 5.56 rifle for use with .22 rim fire ammo?
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JaxChris
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Post subject: Re: ST-22 Posted: Mon Mar 11, 2013 9:24 am |
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Joined: Mon Dec 06, 2010 7:26 pm
Posts: 2838
Location: Florida
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No, dedicated ST-22 bolts have a collar that does not work with 5.56 barrels. Conversion bolts have a chamber adapter that inserts into the 5.56 chamber. On a dedicated upper, the chamber is designed for 22LR (hence the additional depth of 1.5" inside the receiver.
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thibear
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Post subject: Re: ST-22 Posted: Mon Mar 11, 2013 10:14 am |
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Joined: Thu Apr 12, 2012 7:53 am
Posts: 33
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Just the info I needed. Great help as always!
Thank you!
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JaxChris
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Post subject: Re: ST-22 Posted: Mon Mar 11, 2013 4:07 pm |
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Joined: Mon Dec 06, 2010 7:26 pm
Posts: 2838
Location: Florida
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