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Thread: Want to build GM Hydramatic m16 clone. Help!

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  1. #11
    Legacy Member old tanker's Avatar
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    Quote Originally Posted by mrclark303 View Post
    That's new to me, you learn something new every day!

    I have to ask, what the difference in manufacturing between M16A1 contractors that allowed a different ejection pattern, different extractor profile perhaps?
    I do not know. That is what the unit was doing when I got there. Who made the initial correlation is likewise a mystery to me.

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    A Collector's View - The SMLE Short Magazine Lee Enfield 1903-1989. It is 300 8.5x11 inch pages with 1,000+ photo’s, most in color, and each book is serial-numbered.  Covering the SMLE from 1903 to the end of production in India in 1989 it looks at how each model differs and manufacturer differences from a collecting point of view along with the major accessories that could be attached to the rifle. For the record this is not a moneymaker, I hope just to break even, eventually, at $80/book plus shipping.  In the USA shipping is $5.00 for media mail.  I will accept PayPal, Zelle, MO and good old checks (and cash if you want to stop by for a tour!).  CLICK BANNER to send me a PM for International pricing and shipping. Manufacturer of various vintage rifle scopes for the 1903 such as our M73G4 (reproduction of the Weaver 330C) and Malcolm 8X Gen II (Unertl reproduction). Several of our scopes are used in the CMP Vintage Sniper competition on top of 1903 rifles. Brian Dick ... BDL Ltd. - Specializing in British and Commonwealth weapons Specializing in premium ammunition and reloading components. Your source for the finest in High Power Competition Gear. Here at T-bones Shipwrighting we specialise in vintage service rifle: re-barrelling, bedding, repairs, modifications and accurizing. We also provide importation services for firearms, parts and weapons, for both private or commercial businesses.
     

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    Legacy Member MikieG's Avatar
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    Back in 89 i had an H&R A1 in basic. We had the plastic snap in brass deflectors. A few years ago i was in a surplus store on I44 in Missouri when i encountered a bucket of beand new ones. I spent $8 and got me one. I have never used it as my personal A1 has a C7 upper with Brunton bump.

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    Legacy Member El Woodman's Avatar
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    Likely a slightly stiffer extractor spring, or ejector spring...Or lighter....

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    Quote Originally Posted by mrclark303 View Post
    That's new to me, you learn something new every day!

    I have to ask, what the difference in manufacturing between M16A1 contractors that allowed a different ejection pattern, different extractor profile perhaps?
    I have looked at this question myself and found that, a lot of different factors contribute to the patterns of extraction and ejection. I found that most of the patterns are associated with the ejector spring and its wore and care. In production between the three contractors each obtains there ejector springs from different sources thus the tension on the springs are different as long as it ejects the fired case from the rifle. Now pair that up with the build up of crud over time (generally the ejectors are not removed from the bolt for cleaning) ejection patterns will change over time.

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    Legacy Member pocketshaver's Avatar
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    when dealing with the M16icon in period.... sensible soldiers didn't care HOW it ejected, simply that it fed, fired, extracted, and ejected WITHOUT failing every shot, or leave bits of case in the chamber.

    ---------- Post added at 12:09 PM ---------- Previous post was at 12:07 PM ----------

    And just ask any servicemen who had to deal with explosives.. how they felt about having to deal with explosives provided by the cheapest bidder.....

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    Advisory Panel Brian Dick's Avatar
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    Yes, you must keep them clean. I always liked the old SP1, M16icon, M16A1 because when I was young and used to handload for my Colt SP1 and home built Rock Island Armory M15A1, rounds were so consistent that the empties would all land in a pile less than a couple feet in diameter to the right rear. Policing brass was/is quick and easy. The built in brass deflector on the C7 on down the list took that away big time! One of my favorite shooters is an old SGW/Olympic Arms lower with an excellent, complete Colt M16A1 upper assembly I bought at Knob Creek many years ago. Light and handy with zero bells and whistles. I like to keep my hand in shooting the MR31 center with the service rifle of my time and iron sights. It'll still do some impressive groups if I do my part.

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