"Pros: Metal outer Barrel, Brass Inner Barrel, Tough ABS Plastic, Metal Bolt/Cylinder, Nice Hop-Up Made of Aluminum (although I had some trouble with it), the mags are nice they hold 30 rounds(yes I said 30 AMS says 21 that is a lie it is 30)
Things I Liked: Brass Inner Barrel, The Metal Outer Barrel, the fact you can upgrade with L96 /Type 96 parts, The M4 Stock, I really like the style of this gun, The simple mods that can be done to the gun to perform better.
Cons: unlike the Well MB06 the reciever is plastic it is tough though, the piston and spring guide are plastic, the scope rail is also plastic the trigger box internals are cheap pot metal, the trigger itself is plastic, no cheek pad (this is just a personal preference), does not have a second sling mount, the safety has issues it causes the gun to not stay cocked.
THING YOU SHOULD CONSIDER DOING RIGHT OUT OF THE BOX AND BEFORE YOU BUY THIS GUN!!!!!!!!!!!!
First Join this forum and read the material people have posted about things to consider before you decide if you wand to be a sniper or not. www.airsoftsniperforum.com
USE .30G OR HIGHER WIEGHT BBS!!!!!!!!!!!!!!
This is what I Did I upgraded the spring, piston, and springs guide (I got this from www.evike.com), next I did and LRB Mod, Then I romved the hop-up mech completely except the arm I kept it for the TDC mod, TDC Mod, removed the safety mech from the gun is was causing the gun to not stay cocked, painted the gun, and I greased the trigger box, cylinder/cylinder internals with white lithium grease.
Overall I would have to say if you are looking for a project gun this is the one for you I have had fun working on this gun and it now shoots over 520 FPS with .20g BBs on the "Poormans Chrono".
For the price it is great and you can't beat it on AMS.
NOTE: YOU CAN BUY TRIGGER PARTS AT WWW.EVIKE.COM AND OTHER SITES BUT REMEBER THAT YOU ARE LOOKING FOR L96/TYPE96 PARTS. IF YOU WANT A BRAND NEW AND BETTER TRIGGER BOX GO TO AIRSOFTPRO.CZ AND CLICK ON AIRSOFT SNIPER UPGRADES GO TO WELL MB06/MB13 MAKE SURE TO CHANGE THE CURRENCY AT THE TOP OR THE PAGE TO US DOLLARS.
IF YOU WANT MORE INFO ON THIS GUN GO TO http://www.airsoftsniperforum.com/32-general-sniper-talk/13183-guide-cyma-m187.html
I would give it 5 stars but the safety problem, piston/spring guide being plastic, and the receiver being plastic.
If you are looking for a better build go with the WELL MB06 it has a metal receiver and the trigger internals are a little better build. It is a essentially the same gun just a some slight differences in quality. I am not discouraging you from getting this gun I love my CYMA M187"