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Posted: 10/5/2018 12:46:49 PM EDT
Anyone here have any tight groups they want to share with their RDB?

I'm trying to sell a friend on this gun and will need more than my one anecdotal
Link Posted: 10/5/2018 7:29:46 PM EDT
Tag for interest also
Link Posted: 10/5/2018 8:55:32 PM EDT
I'll post some on Tuesday. :)
Link Posted: 10/6/2018 12:04:16 AM EDT
Thanks eviljoe
Link Posted: 10/6/2018 12:43:50 AM EDT
Made the first range trip with the RDB earlier this week. I have it set up with a Primary Arms Cyclops 1x prism scope, a sweet little optic!

I have 53 year-old eyes, and see as well as a man much older. So, I don't expect much from a 1x scope, but the Cyclops and RDB combo delivered several groups of less than 1.5" at 50 yards:



I'm quite pleased with the results. The Cyclops seems more like an extension of the RDB instead of an addition, kind of like the fixed optic on an AUG, and it is very fast on target. I was able to hit the big gong at 200 yards with every shot, too, thanks to the clarity of the glass.



I think the RDB with short handguard is a looker, and I love how it handles. As a bonus, if you wear an old pocket t-shirt and shoot left-handed from the bench, about every other empty case will roll right into that pocket, saving you from having to pick them up.
Link Posted: 10/6/2018 1:14:33 PM EDT
Sweet looking package
Link Posted: 10/6/2018 8:06:29 PM EDT
Mine wouldn't do <1.8moa consistently even with multiple quality loads and the aluminium handguard.
Link Posted: 10/6/2018 8:44:11 PM EDT
I don't expect much better than 3MOA with LAKE CITY M193 ammo....anyone claiming to consistently get better than 1.5" with 55gr milsurp stuff always seems highly suspicious to me.

I will grab a box of 69gr and 77gr Black Hills match stuff...though I'll also need to find a scope to borrow; I won't do that great with my red do--T2 and holosun groups tend to be ~6" at 100Y with 55gr (just a hair better than irons, but faster).
Link Posted: 10/7/2018 1:23:33 AM EDT
I would be nice to see someone build one up with a higher quality barrel, and maybe with a slightly stiffer profile. KT is cheap, so there is no way this is a 'nice' barrel, and at least on my gun, the crown is nothing impressive; there's gonna be a floor on the accuracy figures just from that. Put a nicer barrel with match chamber and a little less whip in there, and I'd love to see how much things change.

1) Bolt is similar enough in theory to an AR that this can't be realistically impacting accuracy, assuming it's decently square (and it is, since we've seen no reports of broken bolts)
2) Due to the long cycle distance, the charging handle is way out front & so is the gas block; the bullet is long gone before the gas system is doing anything like loading up the gas cup
3) The 17" model barrel does extend past the gas block a good ways with a small profile; there may be some Mini-14 type barrel whip issues at play here
4) Trigger is nice enough for a 1MOA shooting rifle, but the lock time is necessarily very long because of the long hammer. Would be interesting to see how groups change when the rifle is bolted down & the shooter's follow through isn't able to impact things.
5) We'd need to cast it to know for sure, but I'd bet the chamber is fairly roomy, and the leade nothing to write home about, since that allows for a reamer to cut more barrels before changing
6) The flash hider seems to encourage the formation of fouling around the crown; there's a restriction/throat right in front of the crown that could be causing this.

Summary; "it's built like a battle rifle, not a DMR" cliche. But it's probably true here.
Link Posted: 10/15/2018 2:37:18 PM EDT
Is it worth putting an ACOG on it or just stick with a red dot?
Link Posted: 10/15/2018 7:28:06 PM EDT
I put a low power acog on mine, haven’t shot it yet though
Link Posted: 10/15/2018 8:32:47 PM EDT
I would be interested to know as well...

I went out to the range after sighting mine in at 50 yds a few weeks ago, and was getting TERRIBLE groups at 100yds... like 12”+.

I get home and realize that the POS Primaty Arms red dot mount that I have installed is loose again (after applying blue loctite to the single mounting screw). I’m going to have to get a better mount and in the future add the cost of a decent mount to the price of any cheap optics I buy at PA.
Link Posted: 10/16/2018 12:27:47 PM EDT
Keep us posted semper
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