The ever-morphing AR15

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I bought this rifle to celebrate being discharged in 1998. Since that time, it has been:

A 20" A2 plain jane parts rifle
A 16" A2 HBAR - all Bushmaster
Bushmaster A2 16" carbine w/ collapsible stock
Bushmaster 16" flattop carbine

By now I've spent enough money changing this one rifle to have owned three others (and in fact the pile of spare parts left over is now enough to
build another rifle entirely minus bolt carrier and barrel). Here is the latest incarnation of one of my favorite rifles:

AR15_6.jpg

Big Version

It is a Bushmaster 16" 1/9 HBAR with:

PRI Gasbuster - great purchase; the Big Latch charging handle release that comes with this is much superior to the Badger Ordnance version in my mind and sells separately for $20. I plan to purchase a suppressor at some point so I went for the Gasbuster charging handle as well for $90 total.

TA11 ACOG w/ ARMS #19S throwlever mount - great mount, great optic. Probably the last thing I'd part with before the actual rifle if I had to give up gear.

ARMS #40 folding rear sight - Excellent backup sight - not as capable as A2 irons; but close.

Sierra Precision grip - Nice meaty grip in the hand unlike many AR grips that are way too skinny. Not lefty friendly unfortunately.

Magpul MSS Modular Stock - Best AR stock I've ever tried. Will easily replace both fixed and collapsible stocks when the ban goes away and prices come down. More solid than the A2 fixed stock and more adjustable than the telestock - great cheekweld too.

Knight's Free Floating RAS - I was a little skeptical about this as I had limited gear that I wanted to attach; but I've been favorably impressed in the limited use I've had of it so far. I've noticed an immediate increase in barrel cooling and the free floating cut groups off the bench by about 40%. On the downside, maintenance of the barrel underneath the handguard requires a bit more work now.

Knight's QD front sling mount - great little rail sling mount but not cheap.

CQB Solutions SOP sling with emergency release buckle - eh... I actually like my $20 Boonie Packer sling from Bushmaster better than this. The Boonie Packer hangs better in transition and obstructs less. Unfortunately the nylon forearm sling attachment did not get along well with a hot RAS, the rear didn't work with the Magpul and the whole reason I free floated was to get the sling off the barrel. On the plus side, the SOPs 1.5" webbing is very comfortable, the sling attachment points are better and the emergency release buckle is handy too. Maybe it will grow on me with more use but right now the way the buttstock hangs out in front of me instead of close in to the body like the BP bugs me to no end as does the extra obstruction potential added by a three-point sling.

(not shown: cheap 1" scope rings and Surefire G2 flashlight - not my optimum choice; but it works for now)

As to the rifle in general, the 16" HBAR was never a problem for me in more stock formats; but with the additional gear the extra weight of the HBAR gets old real fast. It still helps with cooling and muzzle climb during rapid fire; but I'd rather have less weight than the small amount it contributes in those areas. The barrel itself has proven quite accurate though so I'll probably just suck it up and hit the gym instead of replacing it; but if I did have to replace it, I'd try a Colt 1/7 16" lightweight barrel.
 
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Bartholomew

Very nice... your story reminds me of my one and only pre-ban AR... except that mine keeps getting longer :)

Just a quick note on barrels. I wanted a thicker barrel than the 'A2' profile or ultralite barrels offered, but I wanted less weight than the HBAR. Even my fluted 14.5" HBAR is noticeably heavier than the M4 barrel. I finally found what I was looking for at Armalite. Their barrels appear to taper rather quickly from 1" at the receiver to .750" all the way through the front sight and out to the muzzle. It's lighter than a Bushmaster HBAR, but heavier than the .625" ultralite bbls...

My next project will be a 16" barrel with a mid-length Free Float rail tube from Kurt's Kustom. Kurt's top rail meets the rails on the flat-top, and all rails can be custom lengths. I'm going with a full length top and 6" sides and bottom (the mid-length tube is 9")

Thanks for the info on all those products...
 
Nice rifle!

I'm a big fan of the TA11 + #19S combination, too. I'm at the point where I'm buying TA11's for rifles I haven't started building.

You mention the weight of the rifle, and the Hbar profile contributing to that. What is your feeling for where the weight "comes from" in this rifle? Do the modular handguards add a noticable amount?

I am thinking of building up one that is very similar, but with an 18" 1x7 or 1x8 barrel.

-z
 
Those ACOGs are nice but pricey. My solution was to buy more lowers. No upper should ever have to share.
 
I've got some sort of BAC/ACOG affliction. Now I'm thinking of putting them on bolt rifles and such. It must be the tritium affecting my brain.

-z
 
Onslaught - yes, I've been thinking of a tapered midlength 16" barrel myself. I think that is the answer to the few issues I do have with this rig. That's my next project; but it is probably a year or more out right now.

You mention the weight of the rifle, and the Hbar profile contributing to that. What is your feeling for where the weight "comes from" in this rifle? Do the modular handguards add a noticable amount?

Knight's M4 FF-RAS was about 5oz. heavier than the M4 handguards and old barrel nut with most of that weight being in the Knight's steel barrel nut. For me, I think the much better cooling and the free float benefits are well worth the extra 5oz.

Because I built this rifle up slowly over time, I really didn't notice a weight gain for most of the items. It was a few ounces here and a few ounces there and because I was always working with the rifle I never really noticed the change until I added the Magpul stock. It was after adding that I thought "Man, this thing is getting heavy!"

Luckily the Magpul stock is in back, so it actually kind of counterbalances the barrel better and helps with pointing; but you do notice the weight. Right now the point of balance is right over the front takedown pin. Because of this, the rifle still handles well even though it is a bit on the fat side. The 16" HBAR swings better than a 20" Government profile barrel but it isn't in the same ballpark as the 14.5" M4.

Even though the AR doesn't have much muzzle hop, the TA11 magnifies what recoil there is 3.5x so the heavier barrel is nice in that regard; but I bet you could achieve the same thing with better handling by adding a muzzle brake to a lighter barrel.
 
I have little interest in the AR-15, but I have considered it seriously. You just posted a picture of what I was thinking except that I have never seen that stock before. It looks interesting. Gasbuster charging handle, hunh? If the AWB sunsets, I'll have to look into it: I want a folding stock.
 
Very nice. I would be happy with it. It is very similar to what I have come up with after owning 14 ARs and firing many, many thousands of rounds and several classes.
My "go to" AR has the same upper as yours. I personally really like the 16" HBAR and plan on replacing it with the same tube when my present one wears out. The chrome lined chamber, to me, is a must. I have the KAC RAS II, the PRI Gas Buster charging handle, and the ARMS #40 rear sight. The differences are my Aimpoint ML2, Wilderness single point tac sling, A1 stock, Wilson Combat muzzle brake, and standard pistol grip.
It appears that your experience has been very close to mine. This type of configuration seems to epitomize the AR platform to me.
 
444 - Yes, and even where our gear differs, the philosophy is pretty similar. I would have gone with RAS II myself except the hump denied me best use of the TA11 eye relief.

I also would have gone with a single point sling for simplicity (and may yet); but I wanted a sling that allowed more stable carry than a single point.
 
Very nice. Now just buy a bolt carrrier and barrel, assemble the frankenAR from the parts, and sell it at a gun show to recoup some of your losses. The rest of us can simply learn from your (and 444's) mistakes and buy that one from the get-go. Thanks. :)
 
I don't think you could buy one from the get go all put together. Well maybe someone like MSTN would put one together for you all at once, but I think you might get sticker shock.
 
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