Cracked open the new MidwayUSA mailer today and on page 31 there is a SI Defense 300BLK barrel for $171. Anybody have any firsthand experience with these?
SI Defense 300 BLK Barrel
- Thread starter Dirty D
- Start date
Re: SI Defense 300 BLK Barrel
I have one and have been really impressed with it. The only thing I had to do is open up the gas hole to cycle subsonics.
I have one and have been really impressed with it. The only thing I had to do is open up the gas hole to cycle subsonics.
Re: SI Defense 300 BLK Barrel
Are you using an adjustable gas block since you opened up the gas port?
Are you using an adjustable gas block since you opened up the gas port?
Re: SI Defense 300 BLK Barrel
Negative, I physicaly opened up the existing gas port on the barrel. The inside diameter of an AR gas tube is .124 so anything over that diameter is pointless. I usually use a #31 drill bit(.120)
Negative, I physicaly opened up the existing gas port on the barrel. The inside diameter of an AR gas tube is .124 so anything over that diameter is pointless. I usually use a #31 drill bit(.120)
Re: SI Defense 300 BLK Barrel
I also had to open up the gas block on mine for reliable subsonic cycling without a can. I have an adjustable gas block but still needed to open it up just a hair. I can't remember the drill bit I used but I think the .120 sounds close.
I'm still waiting for my suppressor so I haven't really shot mine that much. Seemed to shoot pretty well. I have a .223 Wylde SI-Defense Barrel and it runs fine.
I also had to open up the gas block on mine for reliable subsonic cycling without a can. I have an adjustable gas block but still needed to open it up just a hair. I can't remember the drill bit I used but I think the .120 sounds close.
I'm still waiting for my suppressor so I haven't really shot mine that much. Seemed to shoot pretty well. I have a .223 Wylde SI-Defense Barrel and it runs fine.
Re: SI Defense 300 BLK Barrel
I got my can and tested it out. The SI Defense barrel ran great suppressed and grouped nicely (I was only shooting about 25 yards with iron sights). Considering the price I think it was a great investment for a "fun" gun.
220 SMK 300 BLK through a TBAC 30P1 is silly quiet - I was shocked. All I hear is the gun cycling.
I got my can and tested it out. The SI Defense barrel ran great suppressed and grouped nicely (I was only shooting about 25 yards with iron sights). Considering the price I think it was a great investment for a "fun" gun.
220 SMK 300 BLK through a TBAC 30P1 is silly quiet - I was shocked. All I hear is the gun cycling.
Re: SI Defense 300 BLK Barrel
I just put one on backorder today with Midway, anyone else using one of these barrels?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Boogyman</div><div class="ubbcode-body">Negative, I physicaly opened up the existing gas port on the barrel. The inside diameter of an AR gas tube is .124 so anything over that diameter is pointless. I usually use a #31 drill bit(.120)</div></div>
I never thought about it but that makes perfect sense since the gastube diameter is a limiting factor.
I just put one on backorder today with Midway, anyone else using one of these barrels?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Boogyman</div><div class="ubbcode-body">Negative, I physicaly opened up the existing gas port on the barrel. The inside diameter of an AR gas tube is .124 so anything over that diameter is pointless. I usually use a #31 drill bit(.120)</div></div>
I never thought about it but that makes perfect sense since the gastube diameter is a limiting factor.
Re: SI Defense 300 BLK Barrel
I have an adjustable gas block but still needed to open it up just a hair. I can't remember the drill bit I used but I think the .120 sounds close.
I have an adjustable gas block but still needed to open it up just a hair. I can't remember the drill bit I used but I think the .120 sounds close.
Re: SI Defense 300 BLK Barrel
Same here just had to open up the gas port. I'm happy with it for what it cost.
Same here just had to open up the gas port. I'm happy with it for what it cost.
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