Tandemkross has absolutely knocked it out of the park with this barrel. It is light, but not too light to be unsteady. It is strong and well built, and it is great looking! My son uses this on his competition guns built for shooting extremely fast (Steel Challenge, Metal Madness, Rimfire Challenge, Rimfire Falling Steel etc.). Changing to this barrel moved the balance of his rifle to a grip neutral balance so it makes it very quick to transition yet not too light in the front to make it unsteady when you need to pause on target. The barrel is accurate will all types of .22lr ammo and velocities. He has had zero issues with feeding or extraction, even when it gets dirty after high round count training sessions. It also sheds heat very well even with a high rate of fire for hundreds of shots. You can touch the the chamber area and it will be warm but not hot. This is great for sports that require chamber flags after shooting so you don't have to worry about melting plastic into your chamber!

[img]https://i.imgur.com/UsjlENb.jpg[/img] Final set up with Nikon 2.5 x 8 pistol scope.

Was impressed by it's accuracy. One solid hole @ 25 yards moved back to 50 yards and the group opened up but very slightly. Wind and cold canceled any further testing. But it made me an instant fan.

Great machining quality is the first thing noticeable. Installed easy, looks awesome, shoots great. I would buy again in a heartbeat. Thanks TK.

Fits loose into chassis, used TK block to attach. It did tighten it all up. I shot 250 rounds through it, rechecked everything, seems good, time will tell. Super light barrel, very cool looks. Went with the RED sleeve polished barrel, Nice

So far love the look and weight of the Barrel. Unfortunately doesn't fit on my stock, might need to sand it down for it to fit.

nice quality ,fit snug as should, shoots well. Christmas present, used today and quite can't get the grin off my face!

We just received and installed the Spitfire barrel on my son's competition rifle and all I can say is WOW - Tandemkross knocked it out of the park with this design! Out of the box I could tell this was going to be a game changer, it is almost as light as the 4.5" shrouded barrels on the market but this gives you the full 16" worth of barrel and rifling for much better accuracy and velocity. The barrel installed as expected and we only had to make a minor range adjustment to dial in his red dot sight. After that, he proceeded to torture test it firing close to probably 700 rounds in one shooting session. Accuracy was perfect, there were no issues with feeding or cycling. He shot a mix of standard and high velocity ammo without a noticeable shift in accuracy or cycling. We had 24 x 10 round magazines loaded up and he would run through them all just as fast as he could change magazines. He was working on transitions between targets and was pulling the trigger fast, so this means 240 rounds were fired in a very short period of time. With other barrels, the chamber/receiver area would be too hot to touch with this type of abuse, not to mention, the heat dissipation around the forehand becoming uncomfortable to shoot. I was completely surprised that the Spitfire Barrel was barely warm to the touch. I normally would let the rifle cool for 10 minutes or so before inserting a chamber flag, but with the Spitfire barrel, it was not an issue. This gives me high hopes for long term durability and consistent accuracy regardless of rate of fire. The barrel balances out the Tandemkross ManticoreX "chassis" perfectly, with the balance point at the pistol grip. It makes for quick transitions but steady enough to keep the red dot from bouncing all over the plates. It will be equally at home at action shooting competition or in the field harvesting ingredients for squirrel stew. We haven't testing it for long range accuracy yet, as his main focus is action shooting but we will get one set up for long distance at some point and I'm sure with the tensioned shroud it will perform!

I've been wanting to build a lightweight rifle for indoor silhouette shoots and this barrel fit the bill. Quality is excellent and the install was easy, especially paired with the Tandemcross VBlock and bolts. I couldn't be happier with the setup.