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Posted: 8/1/2014 5:15:38 PM EDT
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Hello I'm a new member and new to AR's well new since it's been 20+ years since I carried an M16A2. I see so many abreviations and such that I'm confused. what is an SPR barrel? I'm building a rifle and I'm looking at barrels for the build and there are so many choices................. I want to buy once not twice! I'm looking at an SPR barrel but do not know what SPR means? Please help a newbie out.
Robert |
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Quoted:
Hello I'm a new member and new to AR's well new since it's been 20+ years since I carried an M16A2. I see so many abreviations and such that I'm confused. what is an SPR barrel? I'm building a rifle and I'm looking at barrels for the build and there are so many choices................. I want to buy once not twice! I'm looking at an SPR barrel but do not know what SPR means? Please help a newbie out. Robert I believe SPR stands for Special Purpose Rifle. Usually a 18" plus barrel. 
Oh and welcome aboard 
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| Being unfamiliar with this website, and the plethora of information on here, this FAQ helps out. |
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SPR barrels usually are stainless steel meant for precision, and the term "SPR" stands for special purpose rifle. Now if you want to buy once then you need to determine if your are going to shoot a lot or shoot tiny groups? I have a Enhanced LightWeight barrel, cause I carry my gun while hunting, and the barrel is plenty accurate for my needs plus I want my AR to be as light as possible.YMMV. |
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Quoted:
Hello I'm a new member and new to AR's well new since it's been 20+ years since I carried an M16A2. I see so many abreviations and such that I'm confused. what is an SPR barrel? I'm building a rifle and I'm looking at barrels for the build and there are so many choices................. I want to buy once not twice! I'm looking at an SPR barrel but do not know what SPR means? Please help a newbie out. Robert If you stick around you'll catch on fast. SPR= Special Purpose Rifle |
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Quoted:
SPR barrels usually are stainless steel meant for precision, and the term "SPR" stands for special purpose rifle. Now if you want to buy once then you need to determine if your are going to shoot a lot or shoot tiny groups? I have a Enhanced LightWeight barrel, cause I carry my gun while hunting, and the barrel is plenty accurate for my needs plus I want my AR to be as light as possible.YMMV. It all depends on what you want out of it (plinker, all-around, hunting, home defense [HD], target, national match) and what budget you have ($400-$4000). Set the basic criteria and ask around...this site will offer you many pieces of advice Welcome.
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Thanks everyone, now I know. I'm wanting to build a Hunting slash home defense rifle. I'm not looking for tiny groups, I just want hit what I aim at. One more question. With a mid length gas system does it use a carbine style buffer tube, spring, and buffer weight? Sorry if these seem like stupid questions, but it's been a long, long, long time since I carried one these! And what's the shortest pull length a rifle gas system you can get? I mean what stock? with the shortest pull length?
Robert |
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Thanks everyone, now I know. I'm wanting to build a Hunting slash home defense rifle. I'm not looking for tiny groups, I just want hit what I aim at. Quoted:
Thanks everyone, now I know. I'm wanting to build a Hunting slash home defense rifle. I'm not looking for tiny groups, I just want hit what I aim at. I would suggest something much lighter weight than an SPR type then. One more question. With a mid length gas system does it use a carbine style buffer tube, spring, and buffer weight? Buffer is the stock in the lower half, gas system is part of the barrel in the upper half. Sorry if these seem like stupid questions, but it's been a long, long, long time since I carried one these! And what's the shortest pull length a rifle gas system you can get? I mean what stock? with the shortest pull length? Huh? You mean shortest stock? The shortest commonly available stock is the normal carbine buffer with telescoping stock fully collapsed, or RRA has an "Entry" fixed stock at that length. If you need something shorter than that, LWRC makes a very short telescoping stock which at full extension is just barely longer than a carbine stock fully collapsed. You mention gas system, gas system has nothing to do with the stock. |
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You have to use a carbine length buffer with a carbine length lower receiver extension, and a *rifle buffer with a rifle length lower receiver extension. The carbine length buffer has several weight configurations such as: carbine (3.0 oz), H (3.8 oz), H2 (4.6 oz), H3 (5.4 oz), and H6 (5.2 oz). The H6 buffer was purposely created for collapsible stocks used with rifle length gas systems. As for the rifle length buffer it weighs 5.2 oz.
*there are spacers made for using carbine length buffers in rifle length lower receiver extensions (buffer tubes). |
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I thought that rifle length buffers would not fit in the 6 position buffer tube! Quoted:
I thought that rifle length buffers would not fit in the 6 position buffer tube! They won't, you use a carbine length buffer in a carbine length tube. Stop confusing stock parts with upper receiver parts, they don't have anything to do with one another. Ok so I can use a 6 position adjustable stock and buffer tube with a rifle length buffer and buffer spring. Do i have this right? No, you use all matching parts in a stock & buffer assembly, DO NOT mix and match rifle stock parts and carbine stock parts. You CAN certainly use a complete telescoping stock/buffer assembly along with a 20" barrel upper, there is no problem. In fact that's the standard Canadian issue service rifle. 
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Quoted: I thought that rifle length buffers would not fit in the 6 position buffer tube! Ok so I can use a 6 position adjustable stock and buffer tube with a rifle length buffer and buffer spring. Do i have this right? |
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Yes, and I suggest a LW barrel for hunting/HD. Quoted:
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I thought that rifle length buffers would not fit in the 6 position buffer tube! Ok so I can use a 6 position adjustable stock and buffer tube with a rifle length buffer and buffer spring. Do i have this right? Incorrect, a rifle buffer or rifle spring WILL NOT work in a carbine length buffer tube. |
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OK I'm really confused here aarrrgg.............. OK so There are collaspable stocks for rifle length systems but I have never seen any! You're confusing yourself. You have a preconceived idea that somehow what you use for a barrel or gas system has something to do with what stock you use, and you persist in trying to apply that idea even though we're telling you it's irrelevant. Thus, you can't find a "collapsible stock for a rifle system" because there is no such thing as a "collapsible stock for a rifle system". There are collapsible stocks. There are fixed stocks. Use whichever you want. Just use the right buffer and spring that matches the length of buffer tube. There are different internal weights and weight configurations of the different external size buffers which can be used to fine tune the operation of a particular setup. |
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Ok I think I've got it! Just make sure I use the correct components together, NO mix and match! Yes. Carbine length buffer tube with carbine spring and a carbine size buffer (could be any of a variety of weights), and stock body that fits on that buffer tube. Or a rifle length buffer tube with rifle spring and a rifle length buffer, and a stock body that fits on that buffer tube. (the exception is...) Vltor has their proprietary "A5" system which uses an odd length buffer tube and a correspondingly odd length buffer. Do not mix those parts with standard type parts. You will not encounter that system very frequently, but just so you know it exists. |
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