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Posted: 10/31/2011 12:45:08 PM EDT
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http://www.palmettostatearmory.com/2552.php http://www.palmettostatearmory.com/2521.php Can any help me with the big differences in the above kits? Is the barrel profile and the gas system the only difference? Either way I'll be using to MOE furniture. Andrew |
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You are correct,the one on the bottom has a 7" gas system with a hammer forged barrel.The hammer forged barrels are supposed to be better.
The one on the top has a 9" gas system with a chrome lined 4150 barrel.The 9"midlength gas system will be a little softer shooting than the 7" gas system of the carbine. |
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Differences in the kits are the 2552 kit is a mid-length gas system and A2 barrel profile out of 4150 steel. The 2521 kit is a carbine gassed M4 profile out of FN CMV (chromemolly vanadium) "Machine Gun Steel" that's hammer forged and PSA also states: 'the chrome process for the bore allows for a lining almost twice as thick as a standard M16 for enhanced durability'. Barrel profiles are different, gas systems are different, and there's a big difference in barrel steel, the 2521 kit has an upgraded barrel that has been MP (magnetic particle) and HP (high pressure) inspected... all things being equal I'd jump on the 2521 kit due to the enhanced barrel materials and construction methods and the fact I'm a fan of the carbine M4 setup. If you're more interested in a middy gas system PSA does have the upgraded barrel in kit 2554, a 14.7" w/pinned and welded A2 to make it a legal 16" http://palmettostatearmory.com/2554.php |
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Quoted: Differences in the kits are the 2552 kit is a mid-length gas system and A2 barrel profile out of 4150 steel. The 2521 kit is a carbine gassed M4 profile out of FN CMV (chromemolly vanadium) "Machine Gun Steel" that's hammer forged and PSA also states: 'the chrome process for the bore allows for a lining almost twice as thick as a standard M16 for enhanced durability'. Barrel profiles are different, gas systems are different, and there's a big difference in barrel steel, the 2521 kit has an upgraded barrel that has been MP (magnetic particle) and HP (high pressure) inspected... all things being equal I'd jump on the 2521 kit due to the enhanced barrel materials and construction methods and the fact I'm a fan of the carbine M4 setup. If you're more interested in a middy gas system PSA does have the upgraded barrel in kit 2554, a 14.7" w/pinned and welded A2 to make it a legal 16" http://palmettostatearmory.com/2554.php Are there any disadvantage to the 14.7in barrel besides accuracy loss? Is the loss significant? I wanted the 1:7 to shoot heavier bullets out to 300yards. In the end we are talking about a sub $600 kit and I don't expect 1/2 MOA, however it will be my only AR for the forseeable furture. My 11yr daughter will also be firing this rifle. Thank you everyone who has responded with your answers. |
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Quoted:
Are there any disadvantage to the 14.7in barrel besides accuracy loss? Is the loss significant? I wanted the 1:7 to shoot heavier bullets out to 300yards. In the end we are talking about a sub $600 kit and I don't expect 1/2 MOA, however it will be my only AR for the forseeable furture. My 11yr daughter will also be firing this rifle. Thank you everyone who has responded with your answers. I've always believed the notion that shorter barrels are inherently less accurate is a myth. A short barrel is stiffer than a longer barrel and therefore should be more mechanically accurate, smallbore target shooters have been using short heavy barrels to achieve maximum accuracy for years. Longer barrels have a velocity advantage and a potential advantage of a longer sight radius but the difference between a 16" and a 14.7" would by nearly negligible in the real world... An interesting read on barrel length and velocity and accuracy in .223: http://www.accuratereloading.com/223sb.html |
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Quoted:
Quoted:
Are there any disadvantage to the 14.7in barrel besides accuracy loss? Is the loss significant? I wanted the 1:7 to shoot heavier bullets out to 300yards. In the end we are talking about a sub $600 kit and I don't expect 1/2 MOA, however it will be my only AR for the forseeable furture. My 11yr daughter will also be firing this rifle. Thank you everyone who has responded with your answers. I've always believed the notion that shorter barrels are inherently less accurate is a myth. A short barrel is stiffer than a longer barrel and therefore should be more mechanically accurate, smallbore target shooters have been using short heavy barrels to achieve maximum accuracy for years. Longer barrels have a velocity advantage and a potential advantage of a longer sight radius but the difference between a 16" and a 14.7" would by nearly negligible in the real world... An interesting read on barrel length and velocity and accuracy in .223: http://www.accuratereloading.com/223sb.html thats a pretty interesting table on velocity. Its amazing how the shot grouping stayed almost the same all the way down to 10 inchs of barrel. You just lose velocity with the decrease. At 14.7" you would still have enough to take down a dear. |
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