Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Classifieds
Media
New media
New comments
Search media
Log in
Register
What's New?
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Navigation
Install the app
Install
More Options
Advertise with us
Contact Us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
The Range
Rifle & Shotgun Discussion
AR-15/M16 Parts kits
Search titles only
By:
Reply to Thread
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="CAR-AR-M16" data-source="post: 1040456" data-attributes="member: 204"><p>If these are the same kits that are being sold in several place, beware that they will have a full-auto sear, trigger, hammer and selector included. You cannot use these parts in your semi-auto build unless they are modified to semi-auto configuration (the auto sear is not used at all in a semi).</p><p> </p><p><strong>[Broken External Image]</strong></p><p> </p><p> </p><p> </p><p>As for the barrel markings:</p><p> </p><p>By 1969 and before serial number 1,750,XXX Colt's chrome chamber barrels were marked C MP C, and the proof markings and C were moved to the same spot. This marking was used as late as 1970 or 1971 and serial number 4,552,XXX. The C means Colts, the M means Magnetic particle inspected, the P for Proof fired, and the C near the muzzle for Chrome chamber. </p><p> </p><p>[ATTACH=full]73930[/ATTACH]</p><p> </p><p>Effective in December 1971 at about serial number 4,700,000 along with the chamber the bores were chromed, early ones were marked C MP B. The C means Colts, the M means Magnetic particle inspected, the P for Proof fired, and the B for chrome Bore. The barrel extention on these not chromed:</p><p> </p><p>[ATTACH=full]73931[/ATTACH]</p><p> </p><p>Starting in 1974 and after serial number 4,900,000 chrome bores were marked C MP CHROME BORE. This marking was used all the way until the end of M16A1 production:</p><p> </p><p>[ATTACH=full]73932[/ATTACH]</p></blockquote><p></p>
[QUOTE="CAR-AR-M16, post: 1040456, member: 204"] If these are the same kits that are being sold in several place, beware that they will have a full-auto sear, trigger, hammer and selector included. You cannot use these parts in your semi-auto build unless they are modified to semi-auto configuration (the auto sear is not used at all in a semi). [b][Broken External Image][/b] As for the barrel markings: By 1969 and before serial number 1,750,XXX Colt's chrome chamber barrels were marked C MP C, and the proof markings and C were moved to the same spot. This marking was used as late as 1970 or 1971 and serial number 4,552,XXX. The C means Colts, the M means Magnetic particle inspected, the P for Proof fired, and the C near the muzzle for Chrome chamber. [attach=full]73930[/attach] Effective in December 1971 at about serial number 4,700,000 along with the chamber the bores were chromed, early ones were marked C MP B. The C means Colts, the M means Magnetic particle inspected, the P for Proof fired, and the B for chrome Bore. The barrel extention on these not chromed: [attach=full]73931[/attach] Starting in 1974 and after serial number 4,900,000 chrome bores were marked C MP CHROME BORE. This marking was used all the way until the end of M16A1 production: [attach=full]73932[/attach] [/QUOTE]
Insert Quotes…
Verification
Post Reply
Forums
The Range
Rifle & Shotgun Discussion
AR-15/M16 Parts kits
Search titles only
By:
Top
Bottom