5kg per gun, 200,000 guns means 1000 tonnes, impossible for 4 containers.
1	5	5	NUM	CD	NumForm=Digit|NumType=Card	2	nummod	2:nummod	SpaceAfter=No
2	kg	kg	NOUN	NNS	Number=Plur	8	nsubj	8:nsubj	_
3	per	per	ADP	IN	_	4	case	4:case	_
4	gun	gun	NOUN	NN	Number=Sing	2	nmod	2:nmod:per	SpaceAfter=No
5	,	,	PUNCT	,	_	2	punct	2:punct	_
6	200,000	200000	NUM	CD	NumForm=Digit|NumType=Card	7	nummod	7:nummod	_
7	guns	gun	NOUN	NNS	Number=Plur	2	appos	2:appos	_
8	means	mean	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	_
9	1000	1000	NUM	CD	NumForm=Digit|NumType=Card	10	nummod	10:nummod	_
10	tonnes	tonne	NOUN	NNS	Number=Plur	8	obj	8:obj	SpaceAfter=No
11	,	,	PUNCT	,	_	12	punct	12:punct	_
12	impossible	impossible	ADJ	JJ	Degree=Pos	10	amod	10:amod	_
13	for	for	ADP	IN	_	15	case	15:case	_
14	4	4	NUM	CD	NumForm=Digit|NumType=Card	15	nummod	15:nummod	_
15	containers	container	NOUN	NNS	Number=Plur	12	obl	12:obl:for	SpaceAfter=No
16	.	.	PUNCT	.	_	12	punct	12:punct	_
