/r/545x39mm
A sub for sharing information on the 5.45x39mm cartridge.
Information on the 5.45x39mm cartridge
- 5.45x39mm on Wikipedia
- AK-74 on Wikipedia
- AK-47 on AR15.com
- 5.45x39 FAQ on AR15.com
- AK Buyers Guide on AR15.com
Relevant Platforms
AR-15
/r/ar15
Ammunition Resources
5.45x39mm Specific Parts Manufacturers
/r/545x39mm
514 Subscribers
Gun show
Has anyone in here had any good luck fun 5.45x39 ar parts like mags and extra bolt faces for the carriers? New to the 5.45 ar platform. Got what i thought was a great deal for a complete upper but mags were not included. Im waiting for a gunshow in my area to pop up and scope around for 5.45 bolt faces for spares and hopefully pick up a few mags.
21:11 UTC
I just put together a 5.45x39 AR15 and it's the best AR15 I have.
Just for the hell of it, I put together a 5.45x39 AR15. Valhalla had a barrel, bolt, and magazine kit for sale so I picked it up. The barrel is a really nice Nitride 16". I put a Superlative adjustable gas block on it and used an Aero receiver. The bolt carrier is a chrome Microbest I picked up on sale from AR15Discounts. I also used an enhanced firing pin. I've found that I have nothing put problems without one of these. I swapped out the flash hider that came with it for a Midwest Two Chamber muzzle brake. The M/W looks kinda sorta like an AK74 brake if you squint. The charging handle is one of my favorites, a VLTOR.
The lower is nothing special. It has one odd thing though that I tried and really like. I started with a Sharps Bros lower that has a built-in ambi bolt release. The kit came with a stronger hammer spring but I'm holding off on that till I run into problems, which I haven't. The one thing I did that I normally don't do is try a Bravo Company MK2 recoil mitigation buffer tube, It's just a longer buffer tube, buffer, and spring. It fits nicely inside the Magpul PRS lite stock. I used a Sprinco green spring instead of OEM spring.
So how did it work? Well, like I said. It's the best AR15 I own. It's the lightest recoiling, smoothest, and with Golden Tiger ammo has decent accuracy. I wish I had some Hornady Black ammo but that stuff is like gold now. I bet that would shoot great.
I was worried about having only one magazine but I found converting Magpul Gen3 mags works really well and I can get 22 in them reliably. I have some 6.8 SPC mags that I'm going to try. I don't think I'll have to do anything to them.
The 5.45x39 is a really great cartridge. It's a real pity it's so expensive now. I really tink that it might be better than the 5.56x45.
18:03 UTC
Tactical SH**
Has anyone else ordered 5.45 from them since sept 1st? I stil havent got my order and it seemed to come in stock and went out of stock again after.
17:08 UTC
Finally got one then they ban the import of the ammo
02:04 UTC
Russian Ammo Ban Megathread
23:46 UTC
ATF proposed rules for receiver definitions are out and comment period has begun. This affects all builders and anyone with a pipe or hardware.
20:02 UTC
Ak74 builders
04:11 UTC
We all know the difference between a 74 & a 47.
05:37 UTC
ak 74 75rnd drum
Just bought an ak 74 from a friend and it included a 75 rnd drum magazine. Upon further research, I've found that drum magazines are hard to find for the ak 74. What do you guys think one would go for? I know it's a converted 7.62x39 romanian drum mag, but haven't seen any for sale. Thanks for any help. Can post a pic if requested.
04:47 UTC
FOIA request regarding the evil AP 5.45 xpost from /r/progun
10:50 UTC
Brief Overview of the AK-74N
19:07 UTC
Red Army Standard.
Has anybody tried the Red Army Standard 5.45 FMJ yet? I am debating between that and Wolf WPA FMJ.
16:06 UTC
Best Deal in Town.
What's the best deal in town currently for 5.45 non corrosive ammo? I recently got a 74 and I want to put it through it's paces.
19:24 UTC
Basic Specs for the 5.45x39 mm cartridge
Thus far, I only have military rounds in the table. If anyone has specifications for commercial rounds, please share.
Military Cartridges
| Cartridge designation | 7N6 | 7N10 | 7N22 | 7T3 (tracer) | 7Kh3 (training) |
|---|---|---|---|---|---|
| Cartridge weight | 10.5 g (162 gr) | 10.7 g (165 gr) | 10.75 g (166 gr) | 10.3 g (159 gr) | 6.65 g (103 gr) |
| Bullet weight | 3.43 g (52.9 gr) | 3.62 g (55.9 gr) | 3.68 g (56.8 gr) | 3.23 g (49.8 gr) | 0.24 g (3.7 gr) |
| Muzzle velocity | 880 m/s (2,887 ft/s) | 880 m/s (2,887 ft/s) | 890 m/s (2,920 ft/s) | 883 m/s (2,897 ft/s) | - |
| Muzzle energy | 1,328 J (979 ft·lbf) | 1,402 J (1,034 ft·lbf) | 1,457 J (1,075 ft·lbf) | 1,259 J (929 ft·lbf) | - |
| Accuracy of fire at 300m (328 yd) (R50) | 75 mm (3.0 in) | 90 mm (3.5 in) | 90 mm (3.5 in) | 140 mm (5.5 in) | - |
Commercial Cartridges
| Cartridge designation | Hornady V-MAX | WOLF Performance FMJ HP | WOLF Military Classic FMJ | WOLF Military Classic HP SP | Barnaul FMJBT | Barnaul SPBT | Barnaul HPBT | ||
|---|---|---|---|---|---|---|---|---|---|
| Cartridge weight | - | - | - | - | - | - | - | - | |
| Bullet weight | 3.89 g (60.0 gr) | 3.89 g (60.0 gr) | 3.89 g (60.0 gr) | 3.565 g (55.0 gr) | 3.85 g (59.4 gr) | 3.56 g (54.9 gr) | 3.56 g (54.9 gr) | ||
| Muzzle velocity | 856.5 m/s (2,810 ft/s) | 895 m/s (2,936 ft/s) | 860 m/s (2,822 ft/s) | 881 m/s (2,890 ft/s) | 860 m/s (2,822 ft/s) | 878 m/s (2,881 ft/s) | 883 m/s (2,897 ft/s) | ||
| Muzzle energy | 1,427 J (1,053 ft·lbf) | 1,558 J (1,149 ft·lbf) | 1,439 J (1,061 ft·lbf) | 1,384 J (1,021 ft·lbf) | 1,424 J (1,050 ft·lbf) | 1,372 J (1,012 ft·lbf) | 1,388 J (1,024 ft·lbf) | ||
| Accuracy of fire at 300m (328 yd) (R50) | - | - | - | - | - | - | - | - | |
| ___ | |||||||||
| Sources: |
11:33 UTC