TLDR: Definitely recommending this bolt action, my favourite, easy to run with on the field, shoots awesome out of the box!; Longer review: I bought this to see if it can perform well out of the box as well as for future upgrades with a massive potential of 45cc cylinder. Also I really like the looks. OOTB it shoots excellent, with 0.45g BBs it's at 3.1Jish for me. The hop unit is great, though i switched the bucking for my favourite Modify X-Range. It's quite quiet actually, big plus for the acoustic foam and sound dampening piston and cylinder head. I relubed the inner cylinder but not using thick grease results in the twang sound from the spring. Trigger (VSR10 compatible) is awesome, responsive, short pull and snappy break. All steel, good quality! The hop unit is remarkable (also VSR10 compatible), comparable to AA quality, it has TDC. I am planning to upgrade it to 3.5J (average site limit in Cz), that might be an easy task by just switching the inner barrel (stock is 300mm) to 430mm, will see. The stock spring is already M170, so no chance on upgrading that unless you are okay with heavier pull. Though, after lubing everything with PTFE it feels quite easy to pull. Comparing to other known or competitive sniper rifles, SSG10 is worse quality and shoots worse, the TAC41 shoots well but the quality on SPR300 feels just better, it's lighter and easier to handle but the SPR300 is literaly 0 upgrade if 3J is enough for you unlike the TAC. Some small pluses – mags fit AR 5.56 pouches, collapsable stock Some minuses – new gun, not many upgrade parts available (well, for those who want to shoot more than 2.8J with heavy bbs, otherwise imo you don't need upgrade parts). Some screws needed to be tightened from the factory.